OK, I’ve always had trouble with this idea. As far as I’ve ever known, when you drop ice in a glass of water, the ice already displaces an amount of water equal to the amount of water in the ice. So as it melts, it won’t cause the water to suddenly overfull the glass. So what’s different about the polar ice that makes it so that it will raise the sea level if it’s already floating in the sea to begin with?
In: Planetary Science
salt water vs fresh water…..the ice and glass example is actually the title of the NASA article
[https://sealevel.nasa.gov/news/261/melting-ocean-ice-affects-sea-level-unlike-ice-cubes-in-a-glass/](https://sealevel.nasa.gov/news/261/melting-ocean-ice-affects-sea-level-unlike-ice-cubes-in-a-glass/)
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